<template>
   <div>
      <div class="search">
        <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音"/>
    </div>
    <div 
    class="search-content" 
    ref="search"
    v-show="keyword"
    >
      <ul>
        <li 
          class= "search-item border-bottom"
         v-for="item of list"
         :key="item.id"
         @click="handleCityClick(item.name)"
        >
          {{item.name}}
        </li>
        <li  class= "search-item border-bottom" v-show="hasNoData">
            没有找到匹配数据
        </li>
      </ul>
    </div>

   </div>
</template>

<script type="text/javascript">
import Bscroll from 'better-scroll'
import {mapMutations} from 'vuex'

export default {
  name: 'CitySearch',
  props:{
    cities : Object
  },
  data() {
    return {
      keyword : '',
      list: [],
      timer : null
    }
  },
  methods:{
      handleCityClick (city){
          this.changeCity(city)
           this.$router.push('/')
      },
      ...mapMutations(['changeCity'])

  },
  computed:{
    hasNoData(){
      return !this.list.length
    }
  },
  watch:{
    keyword () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities){
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || 
               value.name.indexOf(this.keyword) > -1) {
                 result.push(value)
            }
          })
        }
        this.list = result
      }, 100);
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.search)
  }
}
</script>

<style lang="stylus" scoped>
   @import  '~styles/varibles.styl'
   .search
     height .72rem
     padding 0 .1rem
     background $bgColor
     .search-input
         box-sizing border-box
         width 100%
         height .62rem
         line-height .62rem
         text-align center
         border-radius .06rem
         color #666
   .search-content
     z-index 1
     overflow hidden
     position absolute
     top 1.58rem
     left 0
     bottom 0
     right 0
     background #eee
     .search-item
       line-height .62rem
       padding-left .2rem
       color #666
       background #fff
</style>
